utils/README.md

# utils
Small tools needed to solve immediate tasks independently or as part of a project

* [`camsutil`](https://git.hmp.today/pavel.muhortov/utils#camsutil)
* [`cronutil`](https://git.hmp.today/pavel.muhortov/utils#cronutil)
* [`confutil`.py](https://git.hmp.today/pavel.muhortov/utils#confutil-py)
* [`ffmpeger`.py](https://git.hmp.today/pavel.muhortov/utils#ffmpeger-py)
* [`procutil`.py](https://git.hmp.today/pavel.muhortov/utils#procutil-py)
* [`sendmail`.py](https://git.hmp.today/pavel.muhortov/utils#sendmail-py)
* [`simplewc`.py](https://git.hmp.today/pavel.muhortov/utils#simplewc-py)
____
## `camsutil`
**Description:** Creation of a request to the camera API based on the prepared template  
**Dependencies:** Python 3 (tested version 3.9.5)

|  PARAMETERS | DESCRIPTION | DEFAULT|
|-------------|-------------|--------|
|**--host**|hostname or ip address|**REQUIRED**|
|**--user**|valid user|**REQUIRED**|
|**--password**|valid password|**REQUIRED**|
|**--template**|the name of an existing template|**REQUIRED**|
|**[-h]**|print help and exit||
|**[--protocol]**|http, https, etc.|http|
|**[--port]**|port number|80|
|**[--channel]**|ptz channel number|101|
|**[--vid]**|video channel id|1|
|**[--x]**|horizontal positioning: azimuth, pan|0|
|**[--y]**|vertical positioning: elevation, tilt|0|
|**[--z]**|zoom direction, absolute zoom|0|
|**[--speed]**|positioning speed: from 1 to 7|1|
|**[--time]**|momentary duration, max 100000ms|100000|
|**[--text]**|overlay text content|`None`|
|**[--enabled]**|enabled (true) or disabled (false) overlay text|true|

Example usage in terminal with Python:
```shell
python3 ./ptz.py --host HOST --user USER --password PASS --template Hikvision_GetCapabilities.html
```
Example usage in terminal with make the script executable:  
```shell
chmod u+x ./ptz.py
ptz.py --host HOST --user USER --password PASS --template Hikvision_PtzPreset.html --vid 2 --speed 5
```
Example usage in Python:
```Python
from camsutil import ptz

data = ptz.API(host='HOST', user='USER', password='PASS', template='Hikvision_GetJPEG.html', x=1920, y=1080).call()
with open('img.jpg', 'wb') as output:
    output.write(data)
```

____
## `cronutil`
**Description:** Control wrapper for the [schedule](https://github.com/dbader/schedule) package  
**Dependencies:** Python 3 (tested version 3.9.5)

Scheduler works only on a weekly scale. This is due to the use of the [schedule](https://github.com/dbader/schedule) package .  
Target format: wD:HH:MM:SS, where:

wD - day of week unit: `'1'`, `'2'`, ... , `'6'`, `'7'`, `'*'`  
HH - hour unit in 24-hours format: `'00'`, `'01'`, ... , `'22'`, `'23'`, `'**'`  
MM - minute unit: `'00'`, `'01'`, ... , `'58'`, `'59'`, `'**'`  
SS - second unit: `'00'`, `'01'`, ... , `'58'`, `'59'`, `'**'`  

Units can be listed separated by commas.  
Examples:  
`'*:**:**:**'` - every second of every minute of every hour of every day  
`'*:**:**:*5'` - every 05,15,25,35,45,55 seconds of every minute of every hour of every day  
`'*:2*:**:**'` - every second of every minute of every 20,21,22,23 hours of every day  
`'*:2*:**:*5'` - every 05,15,25,35,45,55 seconds of every minute of every 20,21,22,23 hours of every day  
`'3,5:2*:**:*5'` - every 05,15,25,35,45,55 seconds every minute every 20,21,22,23 hours of Wednesday, Friday  
`'1,7:12:00:**'` - every second 00 minutes 12 hours of Monday, Sunday  
`'1:07:00:00'` - every 00 seconds 00 minutes 07 hours Monday  

Example usage in Python:
```Python
from time import strftime
from cronutil import Scheduler


def now():
    print(strftime('%Y.%m.%d %H:%M:%S'))


cron = Scheduler()
cron.add('2,4:**:*0:00,15,30,45', now)
cron.start()
cron.add('2,4:**:59:59', cron.stop)
```

____
## `confutil`.py
**Description:** Parser of configs, arguments, parameters  
**Dependencies:** Python 3 (tested version 3.9.5)  

Example config to parse:
```text
[main]
#   This block contains basic parameters


[httpd]
#   This block contains parameters for the http server

# Address to which to bind listening
#address=0.0.0.0;
# Port to which to bind listening. Port below 1024 requires root privileges.
port=8800;
# Working directory (available to everyone)
directory=www;
```

Example usage in Python:
```Python
from os import path
from confutil import Parse

conf = path.splitext(__file__)[0] + '.conf'
if path.exists(conf):
    print(Parse(parameters=conf, block='httpd'))
```

____
## `ffmpeger`.py
**Description:** FFmpeg management from Python  
**Dependencies:** Python 3 (tested version 3.9.5), installed or downloaded [ffmpeg](https://ffmpeg.org/download.html), [procutil.py](https://git.hmp.today/pavel.muhortov/utils#procutil-py) in the same directory

|  PARAMETERS | DESCRIPTION | DEFAULT|
|-------------|-------------|--------|
|**-s**, **--src**|sources urls|**REQUIRED**|
|**[-h]**|print help and exit||
|**[--preset]**|240p, 360p, 480p, 720p, 1080p, 1440p, 2160p|`None`|
|**[--fps]**|frame per second encoding output|`None`|
|**[--dst]**|destination url|`None`|
|**[--ffpath]**|alternative path to bin|`None`|
|**[--watchdog]**|detect ffmpeg freeze and terminate||
|**[--sec]**|seconds to wait before the watchdog terminates|15|
|**[--mono]**|detect ffmpeg running copy and terminate||

Example usage in cron with Python:
```shell
# at every minute
* * * * * /usr/bin/python3 ~/ffmpeger.py -s rtsp://user:pass@host:554/Streaming/Channels/101 --dst rtmp://a.rtmp.youtube.com/live2/YOUKEY --mono --watchdog --sec 30 >> /dev/null 2>&1
```
Example usage in terminal with make the script executable:  
```shell
chmod u+x ./ffmpeger.py
ffmpeger.py -s rtsp://user:pass@host:554/Streaming/Channels/101 --dst rtp://239.0.0.1:5554
```
Example usage in Python:
```Python
from ffmpeger import FFmpeg

FFmpeg.run(src='null, anull', preset='240p', fps=10)
```

____
## `procutil`.py
**Description:** Find a running process from Python  
**Dependencies:** Python 3 (tested version 3.9.5)

|  PARAMETERS | DESCRIPTION | DEFAULT|
|-------------|-------------|--------|
|**[-h]**|print help and exit||
|**[--find]**|find process pid, name or arguments||
|**[--exclude]**|exclude process pid, name or arguments|`None`|
|**[--self]**|find a clones of self|`True`|
|**[--kill]**|kill the process with pid||

Example usage in terminal with Python for find all running processes:  
```shell
python3 ./procutil.py
```
Example usage in terminal with make the script executable for find all specified processes:  
```shell
chmod u+x ./procutil.py
./procutil.py --find ssh --exclude sftp
```
Example usage in Python for find a clones of self:
```Python
from os import getpid
from sys import argv
from procutil import Proc

processes = Proc.search(' '.join(argv), str(getpid()))
if processes:
    for process in processes:
        print(process)
```
## `sendmail`.py
**Description:** Sending email from Python  
**Dependencies:** Python 3 (tested version 3.9.5)

|  PARAMETERS | DESCRIPTION | DEFAULT|
|-------------|-------------|--------|
|**-u**, **--user**|smtp valid user|**REQUIRED**|
|**-p**, **--pass**|smtp valid password|**REQUIRED**|
|**-d**, **--dest**|destination addresses|**REQUIRED**|
|**[-h]**|print help and exit||
|**[--smtp]**|smtp hostname or ip address|smtp.gmail.com|
|**[--port]**|smtp port number|587|
|**[--stls]**|smtp required TLS|`True`|
|**[--from]**|mail from alias|**--user** value|
|**[--subj]**|mail subject|'no subject'|
|**[--text]**|mail body text|'no text'|
|**[--type]**|mail body type: plain, html|plain|
|**[--file]**|mail attachment files|`None`|

Example usage in terminal with Python:
```shell
python3 ./sendmail.py -u user@gmail.com -p pass -d addr1@gmail.com,addr2@gmail.com
```
Example usage in terminal with make the script executable:  
```shell
chmod u+x ./sendmail.py
./sendmail.py -u user@gmail.com -p pass -d addr1@gmail.com,addr2@gmail.com
```
Example usage in Python:
```Python
from sendmail import Mail

msg = Mail(smtp_user='user@gmail.com', smtp_pass='pass', mail_dest='addr1@gmail.com,addr2@gmail.com')
log = msg.send()
print(log)
```

____
## `simplewc`.py
**Description:** Update Let's Encrypt wildcard certificate with DNS-01 challenge  
**Dependencies:** Python 3 (tested version 3.9.5), 
installed or downloaded [acme.sh](https://github.com/Neilpang/acme.sh), 
installed [dnspython](https://github.com/rthalley/dnspython) package, 
dns is supported to [dynamic update](https://en.wikipedia.org/wiki/Dynamic_DNS)

|  PARAMETERS | DESCRIPTION | DEFAULT|
|-------------|-------------|--------|
|**--domain**|domain for which the wildcard certificate is issued|**REQUIRED**|
|**--server**|master server containing the domain zone|**REQUIRED**|
|**--keyname**|name of the key to update the zone|**REQUIRED**|
|**--keydata**|content of the key to update the zone|**REQUIRED**|
|**[-h]**|print help and exit||
|**[--acmepath]**|alternative path to bin (example: ~/.acme.sh/acme.sh)|`None`|
|**[--force]**|"force" argument for the acme.sh|`False`|
|**[--test]**|"test" argument for the acme.sh|`False`|

Example usage in cron with Python:
```shell
# at 00:00 on Monday
0 0 * * 1 /usr/bin/python3 ~/simplewc.py --domain EXAMPLE.COM --server 8.8.8.8 --keyname KEY --keydata YOU_KEY_CONTENT > /dev/null
```
Example usage in terminal with make the script executable:  
```shell
chmod u+x ./simplewc.py
./simplewc.py --domain EXAMPLE.COM --server 8.8.8.8 --keyname KEY --keydata YOU_KEY_CONTENT --test --force
```

____